#include <iostream>
#include <conio.h>

//understand number is simple or no

int main(){
	int number = 0;
	int stugox = 0; 
	std:: cout << "number = ";
	std:: cin >> number;
	if( ( 2 == number ) || (1 == number ) || (3 == number) || (5 == number) ){
		std:: cout << "number is simple" << std::endl;
		stugox++;
	}
	else if( 0 == number % 2 ){
		std:: cout <<"this number arn`t simple" << std::endl ;
		stugox++;
	}
	else if(0 != number % 2)
	{
		for(int i = 3 ; i <= number / 2 ; i+=2 ){
			if( 0 == number % i ){
				std:: cout <<"this number arn`t simple" << std::endl ; 
				stugox += 1;
				break;
			}
		}
	}
	else{
		std:: cout << "your input number is not integer please insert integer number" << std::endl;
	}
	if(0 == stugox){
		std:: cout << "number is simple" << std::endl;
	}
	getch();
	return 0; 
}